Toward release 0.5.0 - fast TDigest and Spark-3 Aggregator API#20
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for posterity: apache/spark#28983 |
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This is ready to merge and publish but I'm going to wait until spark 3.0.1 for proper array type support in aggregations (SPARK-32159) |
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The goal for 0.5.0 is to adopt the new faster TDigest from isarn-sketches, and simultaneously take advantage of the improvements to User Defined Aggregation in Spark 3.0. I am expecting the combination of these two improvements to approach a 150x performance increase.